Dryer fabric

Active Publication Date: 2008-01-31
ALBANY INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0022]It is therefore a principal object of the invention to provide

Problems solved by technology

“Drop off” can reduce the quality of the paper product being manufactured by causing edge cracks and can also cause sheet breaks, which reduces machine efficiency.
Although both are expensive, both of these expedients allow the air otherwise trapped in the compression wedge to be removed without passing through the dryer fabric.
The use of a seam, then, greatly increases the likelihood that the cellulosic fibrous web will be marked during the drying process.
In these fabrics, where the MD yarn is also the seam loop, it is well known that bending a yarn, especially a single monofilament, around a small radius to form a lo

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Dryer fabric
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Examples

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Embodiment Construction

[0044]The instant invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the illustrated embodiments set forth herein. Rather, these illustrated embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0045]The instant invention relates to full width, full length seamed endless papermaking fabrics for use in a dryer section of a papermaking machine. The papermaker's fabric according to one embodiment of the present invention includes a system of warp yarns or machine direction (“MD”) yarns and a system of shute yarns or cross-machine direction (“CD”) yarns. All of the warp yarns in the system of warp yarns have a non-round or substantially rectangular (flat) cross-section. The...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

A papermaker's fabric which includes a system of CD yarns comprised of a plurality of CD yarns and a system of MD yarns. The system of MD yarns further includes a first subsystem of MD yarns and a second subsystem of MD yarns, which in a vertically stacked relationship with one another. The first subsystem of MD yarns comprises sheds having at least two MD yarns with substantially similar aspect ratios. The aspect ratio of the MD yarns in the second subsystem of MD yarns is greater than that of the MD yarns in the first subsystem of MD yarns. All of the yarns the first and second subsystems of MD yarns are interwoven with the CD yarns of the CD yarn system in a repeat weave pattern. Lastly, seaming loops are formed using only MD yarns from the first subsystem of MD yarns.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to the papermaking arts. More specifically, the present invention is a papermaker's or dryer fabric for use on the dryer section of a paper machine, such as on a single-run dryer section.[0003]2. Background of the Invention[0004]During the papermaking process, a cellulosic fibrous web is formed by depositing a fibrous slurry, that is, an aqueous dispersion of cellulose fibers, onto a moving forming fabric in the forming section of a papermaking machine. A large amount of water is drained from the slurry through the forming fabric, leaving the cellulosic fibrous web on the surface of the forming fabric.[0005]The newly formed cellulosic fibrous web proceeds from the forming section to a press section that includes a series of press nips. The cellulosic fibrous web passes through the press nips supported by a press fabric, or, as is often the case, between two such press fabrics. In the press ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D03D25/00
CPCD21F1/0054D03D3/04D21F1/00
InventorDING, JOHN
OwnerALBANY INT CORP